US20020031234A1 - Microphone system for in-car audio pickup - Google Patents
Microphone system for in-car audio pickup Download PDFInfo
- Publication number
- US20020031234A1 US20020031234A1 US09/893,302 US89330201A US2002031234A1 US 20020031234 A1 US20020031234 A1 US 20020031234A1 US 89330201 A US89330201 A US 89330201A US 2002031234 A1 US2002031234 A1 US 2002031234A1
- Authority
- US
- United States
- Prior art keywords
- signal processing
- microphone array
- processing system
- vehicular
- microphone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Definitions
- FIG. 1 is a block diagram of a system for discerning an audible command from ambient noise in a vehicular cabin, in accordance with the invention
- FIG. 2 is a block diagram of a second embodiment of a system for discerning an audible command from ambient noise in a vehicular cabin, in accordance with the invention.
- FIG. 1 A first embodiment of a system 10 for discerning an audible command from ambient noise in a vehicular cabin, is illustrated in FIG. 1.
- the system includes a microphone array 12 .
- the microphone array 12 preferably includes four microphones 14 , although other quantities are possible.
- the microphone array 12 can be one-, two- or three-dimensional.
- Each of the microphones is coupled to a band-pass filter 16 , which are each coupled to a respective amplifier 18 .
- Each of the amplifiers is coupled to delay and weighting circuitry 20 , which outputs are coupled to an analog or digital signal processor 22 .
- the signal processor performs adaptive beam forming so that the microphone's pick-up pattern can be best directed at the speaker.
- the signal processor has one or more analog or digital outputs 24 , which are coupled to such devices as a cell phone, or circuitry to control vehicular functions, such as controlling the radio, the heater/air conditioner, or the like.
- analog or digital outputs 24 are coupled to such devices as a cell phone, or circuitry to control vehicular functions, such as controlling the radio, the heater/air conditioner, or the like.
- FIG. 1 A second embodiment of a system 10 ′ for discerning an audible command from ambient noise in a vehicular cabin, is illustrated in FIG. 1. Like components have been given the same reference numbers as in the embodiment of FIG. 1.
- each of the microphones 14 of the microphone array 12 is coupled to a respective one of the amplifiers 18 , which is each coupled to a respective one of the delay and weighting circuitry 20 .
- the outputs of the delay and weighting circuitry 20 are summed by a summer 26 .
- the output of the summer 26 is coupled to the bandpass filter 16 , which is coupled to an analog or digital signal processor 22 .
- the signal processor 22 has one or more analog or digital outputs 24 , which are coupled to such devices as a cell phone, or circuitry to control vehicular functions, such as controlling the radio, the heater/air conditioner, or the like.
- the microphone array 12 can be pivotally mounted in the vehicular cabin, to better aim the pick-up pattern at the speaker.
- the vehicular cabin includes a rearview mirror 30 , and the microphone array 12 is located within the mirror 30 .
- a potentiometer, or other position sensor can be attached to the mirror 30 , such that the position of the mirror 30 can be detected. This positional information can be used by the signal processor 22 for further adjustment of the beam of the microphone array 12 .
- the vehicular cabin includes a headliner 32 , and the microphone array 12 can be located within the headliner 32 .
- the vehicular cabin may also include a overhead console 34 , and the microphone array 12 can be located within the overhead console 34 .
- the vehicular cabin includes a dashboard 36 , and the microphone array 12 can be located within the dashboard 36 .
- the vehicular cabin also includes a visor 40 , and the microphone array 12 can be located within the visor 40 .
- the vehicular cabin includes also a pillar 42 , and the microphone array 12 can be located within the pillar 12 .
- Other possible locations include a headrest 44 , a steering wheel 46 , or a compartment door 48 .
- the signal processor 22 can perform various signal processing techniques, such as Griffiths Jim processing, Frost processing, or adaptive signal processing. It can also perform adaptive noise reduction. The signal processing may also be acoustic.
- the signal processor 22 includes circuitry for detecting failure of one of the microphones 14 of the microphone array 12 , and circuitry responsive to the failure detection for compensating for the failure of the microphone 14 .
- the signal processor 22 is selectively directional between two potential audible command sources.
Abstract
Description
- This application claims priority from provisional application Serial No. 60/214,873 filed Jun. 28, 2000.
- Not Applicable.
- The present invention relates to a system for discerning an audible command from ambient noise in a vehicular cabin, and more particularly, to such a system which permits audible control of vehicular functions.
- Microphones located in vehicular cabins for detecting the voice of a speaker, such as of the driver and/or passengers, are well known. Typically, such microphones are for person-to-person telecommunication devices, such as cellular telephones or two-way radios.
- Vehicular cabins tend to be a relatively noisy environment, including such ambient noise sources as wind noise, road noise, radio noise, fan noise, or the like. Such an environment can make accurate voice detection and recognition difficult.
- The location of the speaker in a vehicular cabin also can vary, as people tend to be of different sizes, they tend to shift in their seating, and the location of a seat in a vehicle can change.
- In person-to-person communication, the quality of the voice signal is not as critical, because the human ear and sound processing ability can help distinguish the voice from the noise. However, inhuman-to-machine communication, such as for voice control of vehicular functions, such voice degradation can prevent the system from operating.
- The present invention is provided to solve these and other problems.
- It is an object of the invention to provide a system for discerning an audible command from ambient noise in a vehicular cabin.
- In accordance with the invention, the system comprises a microphone array and a signal processing system.
- It is contemplated that the microphone array is one-, two-, or three-dimensional.
- It is further contemplated that the microphone array may be pivotally mounted in the vehicular cabin, such as within the vehicle's mirror. Alternatively, the microphone array may be located within the vehicle's headliner, overhead console, dashboard, visor, pillar, headrest, steering wheel, compartment door, or such other interior surface of the vehicle.
- It is still further contemplated that the signal processing system may be analog, wherein the analog signal processing system performs a delay and sum processing function. Alternatively, the signal processing system may be digital, wherein the digital signal processing system performs Griffiths Jim processing, Frost processing, or adaptive signal processing, such as adaptive beamforming and/or adaptive noise reduction.
- It is yet further contemplated that the system includes a plurality of microphone arrays, and the signal processing system includes multiple output channels.
- It is still yet contemplated that the vehicle has a controllable parameter, and the system includes means responsive to the audible command for controlling the parameter.
- It is further contemplated that the system includes means for detecting failure of one microphone of the microphone array, and means responsive to the failure detection for compensating for the failure of the microphone.
- FIG. 1 is a block diagram of a system for discerning an audible command from ambient noise in a vehicular cabin, in accordance with the invention;
- FIG. 2 is a block diagram of a second embodiment of a system for discerning an audible command from ambient noise in a vehicular cabin, in accordance with the invention; and
- FIG. 3 is a perspective drawing of a vehicular cabin, illustrating locations for microphone arrays, in accordance with the invention;
- While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail preferred embodiments of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the broad aspect of the invention to the embodiments illustrated.
- A first embodiment of a
system 10 for discerning an audible command from ambient noise in a vehicular cabin, is illustrated in FIG. 1. The system includes amicrophone array 12. Themicrophone array 12 preferably includes fourmicrophones 14, although other quantities are possible. Themicrophone array 12 can be one-, two- or three-dimensional. Each of the microphones is coupled to a band-pass filter 16, which are each coupled to arespective amplifier 18. Each of the amplifiers is coupled to delay andweighting circuitry 20, which outputs are coupled to an analog ordigital signal processor 22. The signal processor performs adaptive beam forming so that the microphone's pick-up pattern can be best directed at the speaker. The signal processor has one or more analog ordigital outputs 24, which are coupled to such devices as a cell phone, or circuitry to control vehicular functions, such as controlling the radio, the heater/air conditioner, or the like. A more detailed explanation can be found in PCT Application WO 00/30264. - A second embodiment of a
system 10′ for discerning an audible command from ambient noise in a vehicular cabin, is illustrated in FIG. 1. Like components have been given the same reference numbers as in the embodiment of FIG. 1. In thesystem 10′, each of themicrophones 14 of themicrophone array 12 is coupled to a respective one of theamplifiers 18, which is each coupled to a respective one of the delay andweighting circuitry 20. The outputs of the delay andweighting circuitry 20 are summed by asummer 26. The output of thesummer 26 is coupled to thebandpass filter 16, which is coupled to an analog ordigital signal processor 22. As with the first embodiment, thesignal processor 22 has one or more analog ordigital outputs 24, which are coupled to such devices as a cell phone, or circuitry to control vehicular functions, such as controlling the radio, the heater/air conditioner, or the like. - Referring to FIG. 3, the
microphone array 12 can be pivotally mounted in the vehicular cabin, to better aim the pick-up pattern at the speaker. Preferably, the vehicular cabin includes arearview mirror 30, and themicrophone array 12 is located within themirror 30. By placing themicrophone array 12 in themirror 30, the direction of themicrophone array 12 will be adjusted relative to the position of the driver. A potentiometer, or other position sensor, can be attached to themirror 30, such that the position of themirror 30 can be detected. This positional information can be used by thesignal processor 22 for further adjustment of the beam of themicrophone array 12. - Other locations for the
microphone array 12 are also possible. For example, the vehicular cabin includes aheadliner 32, and themicrophone array 12 can be located within theheadliner 32. The vehicular cabin may also include aoverhead console 34, and themicrophone array 12 can be located within theoverhead console 34. The vehicular cabin includes adashboard 36, and themicrophone array 12 can be located within thedashboard 36. The vehicular cabin also includes avisor 40, and themicrophone array 12 can be located within thevisor 40. The vehicular cabin includes also apillar 42, and themicrophone array 12 can be located within thepillar 12. Other possible locations include a headrest 44, asteering wheel 46, or acompartment door 48. - The
signal processor 22 can perform various signal processing techniques, such as Griffiths Jim processing, Frost processing, or adaptive signal processing. It can also perform adaptive noise reduction. The signal processing may also be acoustic. Thesignal processor 22 includes circuitry for detecting failure of one of themicrophones 14 of themicrophone array 12, and circuitry responsive to the failure detection for compensating for the failure of themicrophone 14. Thesignal processor 22 is selectively directional between two potential audible command sources. - While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of the invention and the scope of protection is only limited by the scope of the accompanying Claims.
Claims (68)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/893,302 US20020031234A1 (en) | 2000-06-28 | 2001-06-27 | Microphone system for in-car audio pickup |
Applications Claiming Priority (2)
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US21487300P | 2000-06-28 | 2000-06-28 | |
US09/893,302 US20020031234A1 (en) | 2000-06-28 | 2001-06-27 | Microphone system for in-car audio pickup |
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US20020031234A1 true US20020031234A1 (en) | 2002-03-14 |
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US09/893,302 Abandoned US20020031234A1 (en) | 2000-06-28 | 2001-06-27 | Microphone system for in-car audio pickup |
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Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030099345A1 (en) * | 2001-11-27 | 2003-05-29 | Siemens Information | Telephone having improved hands free operation audio quality and method of operation thereof |
US20040133426A1 (en) * | 2003-01-07 | 2004-07-08 | Nissan Motor Co., Ltd. | Vocal sound input apparatus for automotive vehicle |
EP1524879A1 (en) | 2003-06-30 | 2005-04-20 | Harman Becker Automotive Systems GmbH | Handsfree system for use in a vehicle |
US20050190943A1 (en) * | 2004-01-10 | 2005-09-01 | Nick Disange | Motor vehicle microphone arrangement |
WO2005082669A1 (en) * | 2004-02-27 | 2005-09-09 | Daimlerchrysler Ag | Motor vehicle comprising a microphone |
US20050207605A1 (en) * | 2004-03-08 | 2005-09-22 | Infineon Technologies Ag | Microphone and method of producing a microphone |
DE102004050953A1 (en) * | 2004-03-31 | 2005-11-03 | Daimlerchrysler Ag | Motor vehicle with mounting space for a microphone |
US20060098826A1 (en) * | 2004-11-05 | 2006-05-11 | Phonic Ear Inc. | Method and system for amplifying auditory sounds |
US20090055178A1 (en) * | 2007-08-23 | 2009-02-26 | Coon Bradley S | System and method of controlling personalized settings in a vehicle |
USRE40781E1 (en) | 2001-05-31 | 2009-06-23 | Pulse Mems Aps | Method of providing a hydrophobic layer and condenser microphone having such a layer |
WO2009128566A1 (en) * | 2008-04-17 | 2009-10-22 | Panasonic Corporation | Sound pickup apparatus and conference telephone |
CN101796852A (en) * | 2008-06-24 | 2010-08-04 | 松下电器产业株式会社 | Microphone device |
US20110101654A1 (en) * | 2009-10-29 | 2011-05-05 | Tk Holdings Inc. | Steering wheel system with audio input |
CN103002389A (en) * | 2012-11-08 | 2013-03-27 | 广州市锐丰音响科技股份有限公司 | Acoustic receiving device |
US20140133603A1 (en) * | 2007-04-30 | 2014-05-15 | Scott R. Velazquez | Adaptive digital receiver |
WO2014143431A1 (en) * | 2013-03-12 | 2014-09-18 | Motorola Mobility Llc | Method and device for adjusting an audio beam orientation based on device location |
RU2538031C2 (en) * | 2012-10-16 | 2015-01-10 | Федеральное государственное образовательное бюджетное учреждение высшего профессионального образования Московский технический университет связи и информатики (ФГОБУ ВПО МТУСИ) | Method for highly directional reception of sound waves |
US9088842B2 (en) | 2013-03-13 | 2015-07-21 | Bose Corporation | Grille for electroacoustic transducer |
US9174588B2 (en) | 2013-12-13 | 2015-11-03 | Bose Corporation | Mounting a microphone on a vehicle headliner |
US9327628B2 (en) | 2013-05-31 | 2016-05-03 | Bose Corporation | Automobile headrest |
US20160225386A1 (en) * | 2013-09-17 | 2016-08-04 | Nec Corporation | Speech Processing System, Vehicle, Speech Processing Unit, Steering Wheel Unit, Speech Processing Method, and Speech Processing Program |
US9699537B2 (en) | 2014-01-14 | 2017-07-04 | Bose Corporation | Vehicle headrest with speakers |
US20180007480A1 (en) * | 2016-05-19 | 2018-01-04 | Michael D. Dieringer | Patrol vehicle communications system |
US20190019494A1 (en) * | 2017-07-11 | 2019-01-17 | Ford Global Technologies, Llc | Quiet zone for handsfree microphone |
WO2019130282A1 (en) * | 2017-12-29 | 2019-07-04 | Harman International Industries, Incorporated | Acoustical in-cabin noise cancellation system for far-end telecommunications |
US10405115B1 (en) * | 2018-03-29 | 2019-09-03 | Motorola Solutions, Inc. | Fault detection for microphone array |
DE102004019827B4 (en) | 2004-02-27 | 2022-04-14 | Bayerische Motoren Werke Aktiengesellschaft | Motor vehicle with microphone |
US11463828B2 (en) | 2019-12-27 | 2022-10-04 | Knowles Electronics, Llc | Acoustic devices with inwardly-facing transducers |
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Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US6785381B2 (en) * | 2001-11-27 | 2004-08-31 | Siemens Information And Communication Networks, Inc. | Telephone having improved hands free operation audio quality and method of operation thereof |
US20030099345A1 (en) * | 2001-11-27 | 2003-05-29 | Siemens Information | Telephone having improved hands free operation audio quality and method of operation thereof |
US7171006B2 (en) * | 2003-01-07 | 2007-01-30 | Nissan Motor Co., Ltd. | Vocal sound input apparatus for automotive vehicle |
US20040133426A1 (en) * | 2003-01-07 | 2004-07-08 | Nissan Motor Co., Ltd. | Vocal sound input apparatus for automotive vehicle |
EP1524879A1 (en) | 2003-06-30 | 2005-04-20 | Harman Becker Automotive Systems GmbH | Handsfree system for use in a vehicle |
US20050190943A1 (en) * | 2004-01-10 | 2005-09-01 | Nick Disange | Motor vehicle microphone arrangement |
WO2005082669A1 (en) * | 2004-02-27 | 2005-09-09 | Daimlerchrysler Ag | Motor vehicle comprising a microphone |
DE102004019827B4 (en) | 2004-02-27 | 2022-04-14 | Bayerische Motoren Werke Aktiengesellschaft | Motor vehicle with microphone |
US7503616B2 (en) | 2004-02-27 | 2009-03-17 | Daimler Ag | Motor vehicle having a microphone |
DE102004011149B3 (en) * | 2004-03-08 | 2005-11-10 | Infineon Technologies Ag | Microphone and method of making a microphone |
US20050207605A1 (en) * | 2004-03-08 | 2005-09-22 | Infineon Technologies Ag | Microphone and method of producing a microphone |
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